package com.hmdp.utils;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

import static com.hmdp.utils.RedisConstants.COUNT_BITS;

@Component
public class RedisIdWorker {

    private static final long BEGIN_TIMESTAMP =1640995200L;

    @Resource
    private StringRedisTemplate stringRedisTemplate;
    public long nextId(String keyPrefix){

        LocalDateTime now = LocalDateTime.now();
        long nowSecond =now.toEpochSecond(ZoneOffset.UTC);
        long timestamp = nowSecond-BEGIN_TIMESTAMP;

        String date =now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));

        long count =stringRedisTemplate.opsForValue().increment("icr:"+keyPrefix+":"+date);

        return  timestamp << COUNT_BITS | count;
    }

    public static void main(String[] args) {
    }
}
